Wrench.



J. DOLAN.

WRENCH.

APPLIOATION I'ILED MAY 16, 1912.

1,036,585., Patented Aug. 27, 1912.

'of Pennsylvania,

. positive grip,

Fig. 2 1s a operate with a jaw 5.

JOHN DDLAN, 0F DUQUESNE, FENNSYLVANIA.

wannon.

Specification of Letters Eatent.

Patented new. at, rare.

Application filed Hay 16, 1912. serial No. 6973763.

To all whom it may concern;

Be it known that 1, JOHN DOLAN, a citizen of the United States, residing at Duquesne, in the county of Allegheny and State have invented a new and useful Improvement in Wrenches, of which the following is a specification.

This invention relates to a wrench attachment and this attachment is adapted to be applied to a number of'difl'erent wrenches,

including those of the Stilson type.

The object of the invention is to insure a case of action, and ready replacement of any worn or broken part.

While the invention may be applied as an attachment to all wrenches in use, it can also be employed in the, construction of new wrenches as illustrated in the drawing, in which,

Figure 1 is a side view of the wrench.

longitudinal section, a handle, shank, jaws and other parts being shown in side elevation. Fig. 3 is a detail view partly in section of a plate with a pivoted jaw shown in open position. Fig. 4 is a section on the line 4'4c of Fig. 2. Fig. 5 is a plan viewof a blank from which a U-shaped plate is constructed. Fig. 6 is a section on the line 6-6 of Fig. 2.

In these drawings 1 represents a handle, 2 a shank having threads 3 formed upon its back and front edges, and said shank carries an integral jaw 4: which is adapted to co- Tn order to connect the handle and shank 2, and "also to connect the jaw 5 to the hendie I employ a U-shaped plate 6. In Fig. 5

i I have illustrated a blank from which said plate is formed, said blank consisting of a plate A, the central portion of which is cut out leaving side portions B and the cut-out portion of the plate has ribs 0 pressed or otherwise formed upon it, the inner ends of said ribs being spaced from each other, and that-portion of the plate between the ribs is then bent along the dotted lines D. The plate G-thereby formed has a U-shaped'memher and the bow portion 7 has its central portion bent inwardly and longitudinally to form a bearing upon which the neck of the shank 2 can rock. Extending rearwardly from thesaid U-shaped plate are side members 8 which at their rear ends carry upwardly projecting guides 9. Transverse ribs 10 extend exteriorly up the bow portion of the plate 6, and serve .the threads 3, said 'nal central line,

to strengthen said plate. Thisv plate may be formed of sheet metal or any other suitable material.

I The handle 1 has its forward end reduced and recessed as shown at 11 to receive the coil spring 12. This reduced end portion of the handle fits between and is riveted to the 5 is reduced to fit j side members 8. The jaw within the front portion of the plate 6 and is pivoted therein by means of a rivet or pivot pin 13, said pin being located inthe lower front corner of the plate 6. The jaw- 5 is held innormal position by means of screws 14 which work through opposite sides ofthe plate 6 and thread into opposite sides of thejaw 5. Upon its inner face the said jaw is recessed as shown at 15, a lug 16 extending rear wardly from the jaw into said recess and a spring plate 17 has abifurcated end portion which straddles the lug 16 and is pivotally connected thereto. A knurled nut 18 works'upon the shank 2 and engages nut being mounted between the bow portion of the plate 6 and the guide members i 9, whereby longitudinal movement of the nut withreference to the handle 1 is prevented. The free end of the spring plate 17 rests upon the coiled spring 12 and is pressed by said spring against the nut 18. The pressure of this plate not only serves to prevent accidental turning of the nut but also tends to throw the rear end portion of the shank 2 at a slight angle to thehandle 1, such inclination being permitted bythe angling of the bow portionof the plate 6 as shown at 7. This forces the jaw 4 into a position substantially parallel to the jaw 5 and insures a positive grip upon thedarticle on which the wrench is to be use By removing the screws 14, the jaw 5 can be swung outwardly as. shown in Fig. 3, thereby permitting easy removal of the plate 17 and the spring 12, in'case either of these parts should require replacing.

What-T claim is i 1. A wrench comprising a U-shaped plate having side extensions and havin the bow portion bent inwardly along its longitudithereby forming a hearing within the-upper portion of the bow, a handle having its forward end secured, between said side extensions, said forward end being reduced and recessed, a threaded shank fitting loosely in the bow portion and adapted to rock upon the bearing formed therein, a jaw carried by said shank, a jaw secured in handle, a nut working upon the shank, a

pivoted plate carried by the second mentioned jaw and bearing upon said nut and a spring seated in the recess of the handle and bearing upon said plate.

2. A wrench attachment consisting of a U- shaped plate, the bow portion of which is bent inwardly along its longitudinal central line, said plate having ribs formed upon its side members, and in alinement with said depressed portion, the said U-shaped plate having side extensions, said side extensions having upwardly extending guide members, a handle adapted to fit between said side members, a shank having a jaw, said shank fitting loosely in the bow portion of the I plate and adapted to rock upon thebea'ring formed by depressing said. bow portion, a nut working upon the shank, said nut being held between said bow portion and said guide members, a jaw pivotally carried between the side members of said plate and in JOHN DOLAN.

Witnesses:

DAVID J. GINEVAN, H. WEINSIEIN. 

